SOLUTION: Show algebraically that the proportion a-b/b = c-d/d AND a/b = c/d are equivalent

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Question 1067716: Show algebraically that the proportion a-b/b = c-d/d AND a/b = c/d are equivalent
Answer by Boreal(15235) About Me  (Show Source):
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(a-b)/b=(c-d)/d
(a/b)-1=(c/d)-1
add 1 to both sides
(a/b)=(c/d)